ander / subcommand

Subcommand
==========

A minimal command line parser for subcommands.

* Subcommand parses commands of type "COMMAND SUBCOMMAND ARG1 ARG2 ...".
* No switches are supported (like -v)
* Last argument can be made optional by surrounding it with []
* Default command can be set. It's called when user runs the executable
  with no arguments.

An example:

sub = Subcommand.new

sub.register('create', ['TITLE'], 'Create TODO item with title TITLE.') do |title|
  Todo.create!(title)
end

sub.register('list', [], 'List all TODO items.') do
  list_all_todos
end

sub.default = 'list'

sub.parse